I have a big image that I'm using in the React Native ImageBackground component.
function Component(){
return <ImageBackground style={{
height: 300,
width: '100%',
}}/>;
}
The size is correct, but I would like to reposition the image internally as in object-position in css. What is an equivalent style selector?
Try using resizeMode prop of Image. ImageBackground inherits app the properties of Image. Setting correct image resizeMode should resolve your issuel.
Refer this : https://reactnative.dev/docs/image#resizemode
Related
Is there any way to blur a background in react-native without using any external library.
for example, the below code blurs in web versions,
div {
background-color: rgba(28, 28, 28, 0.8);
backdrop-filter: blur(14px);
}
I tried using blurRadius and backdropfilter to but none works.
if I understood correctly, I think you can use View has low opactiy
<View style={{height:200, width:200 ,opacity:0.5,backgroundColor:'gray'}}>
<Text>Blur</Text>
</View>
Or you can use ImageBackground
<ImageBackground
source={require('YOUR_BACKGROUND_IMAGE')}
blurRadius={90}>
....
</ImageBackground>
I'm trying to render an Image as background, but is not working, I don't know why. Here is my code.
<ImageBackground
source={require('../assets/images/logos/AFC.svg')}
resizeMode="cover"
style={styles.style}>
</ImageBackground>
React Native does not directly support using SVG format images. In order to use SVG Images you must use 3rd party libraries. I suggest using react-native-svg. Which is a great library and here is a tutorial you can use to set it up.
Your use case is to set it as a background image. It would be better to use png or jpg formats for use with Image Background component in react native. If you only have svg format of the image, then you can set it in View and control the view
You should use react-native-svg to display SVGs.
if you want a svg in background you can do this example below
import { View, Text, Dimensions } from 'react-native'
import React from 'react'
import AFCIcon from '../assets/images/logos/AFC.svg'
const SCREEN = Dimensions.get("screen");
const App = () => {
return (
<View style={{ flex: 1 }}>
<View style={{
position: "absolute",
width: "100%",
height: "100%",
bottom: 0,
zIndex: -1,
}}>
<AFCIcon width={SCREEN.width} height={SCREEN.height} />
</View>
{/* your code here */}
</View>
)
}
export default App
I have problems with the transparency of a View in React Native Expo, within the View I have text but this is not seen on iphone devices and on androids the text is seen with transparency but it is not what I want.
Code:
<View style= {{paddingHorizontal:30, borderRadius:1, marginTop:5}}>
<View style={{alpha = 1.0, alignItems:'center', borderRadius:10, backgroundColor: 'white', alignContent:'center', paddingVertical:10}}>
<Text style={{fontSize:15, color:'white', fontWeight: 'bold'}}>Iniciar Sesión</Text>
</View>
</View>
What I want to do:
enter image description here
What i get:
enter image description here
The alpha on the style is applied to the entire view and as a result also causes the all child components to become transparent. You want to apply your alpha only to the background color of the parent view. In react-native you can achieve that by defining your backgroundcolor rgba format
Color documentation can be found
https://reactnative.dev/docs/colors
And here is an expo snack to demonstrate the behavior.
https://snack.expo.io/sl8VafHil
I'm new to React-native and I've a very simple(at least i think so) problem.
I've an ImageBackground with resizeMode='contain', now I would like to have the background positioned to the top of the container...
<ImageBackground style={styles.imageBackground} source={backgroundImage} resizeMode='contain'>
... some content
</ImageBackground>
The image is rendered in the right way, but the problem is that it is vertically centered, instead I would like to have it top aligned...
This is an example of the result of my ImageBackground
This is an example of the result with the bottom added to ImageStyle
In the ImageBackground component, the image isn't vertically centered, rather it is positioned absolutely to fill the container. You can check the source here. The reason it's appearing vertically centered is probably because of the resizeMode contain. To top align it, you can make user of the prop imageStyle that you can set to something like this:
<ImageBackground
imageStyle={{
bottom: 40 // Whatever offset you want from the bottom
}}
/>
I am attempting to implement a cropping tool with pinch zoom in React Native. The cropping works fine, but I am having trouble zooming the image while my overlay is on top of it.
Code:
<ScrollView
maximumZoomScale={2}
minimumZoomScale={1}
scrollEnabled={false}
bouncesZoom={false}>
<Animated.View
style={this.getStyles()}
{...this._panResponder.panHandlers}>
<View>
<Image style={[{height: getCropContainerHeight(),
width: this.getCropContainerWidth()}]}
source={{uri: this.props.image}} />
</View>
</Animated.View>
<Overlay movement={{...this._panResponder.panHandlers}} />
</ScrollView>
If the Overlay is inside of the Scrollview, then both the overlay and the image get zoomed in. If the Overlay is outside of the ScrollView then of course the Image does not zoom.
Here is what my app looks like
Any thoughts on how can I zoom in on ONLY the image, without affecting the overlay?
If you want the ScrollView to handle the touch events, you can place the overlay outside of the ScrollView, position it on top of the ScrollView using position: relative or position: absolute, and give the overlay root view a pointerEvents prop of "none".
This way the overlay won't capture the touches.